https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109954
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yeah, my suggestion doesn't try to explain the full details that you pointed out, just adds a brief note to avoid the pitfall of not overriding the default arch, for a probably quite common case. I chose i486 to avoid any confusion that could arise from -march=i386 being interpreted as "any generic x86" system. IMHO i486 seems more obviously "a specific CPU family" and not just a generic term for x86, e.g., Debian still uses "i386" even though their x86 packages are actually built for i686.
